diff --git a/AdaptiveBrightnessFirmware/Inc/uart_vcp.hpp b/AdaptiveBrightnessFirmware/Inc/uart_vcp.hpp
index 3dbd4e4..abeb23a 100644
--- a/AdaptiveBrightnessFirmware/Inc/uart_vcp.hpp
+++ b/AdaptiveBrightnessFirmware/Inc/uart_vcp.hpp
@@ -82,7 +82,7 @@ class VirtualComPort {
         while(usbReady())
             ;
 
-        std::memcpy(const_cast<uint8_t*>(m_usbAsyncTxBuffer.data), const_cast<uint8_t*>(m_txBuffer.data), m_txBuffer.size);
+        std::memcpy(const_cast<uint8_t*>(m_usbAsyncTxBuffer.data), const_cast<const uint8_t*>(m_txBuffer.data), m_txBuffer.size);
         m_usbAsyncTxBuffer.size = m_txBuffer.size;
         m_txBuffer.size = 0;